hyper-v: trace vmbus_close_internal()

Add tracepoint to CHANNELMSG_CLOSECHANNEL sender.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index 739b3fe1e0fbbfb761e39a19c3d97959bcdce31b..a827f43aa4084efba90a1b92a7cff76b1ec52342 100644 (file)
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -591,6 +591,8 @@ static int vmbus_close_internal(struct vmbus_channel *channel)
        ret = vmbus_post_msg(msg, sizeof(struct vmbus_channel_close_channel),
                             true);
 
+       trace_vmbus_close_internal(msg, ret);
+
        if (ret) {
                pr_err("Close failed: close post msg return is %d\n", ret);
                /*

diff --git a/drivers/hv/hv_trace.h b/drivers/hv/hv_trace.h
index 38fedb803bd82eb54b063f094387a355344a8485..302bd4e964f0a9b0736192ceb21642ce0705c3c4 100644 (file)
--- a/drivers/hv/hv_trace.h
+++ b/drivers/hv/hv_trace.h
@@ -157,6 +157,21 @@ TRACE_EVENT(vmbus_open,
                    )
        );
 
+TRACE_EVENT(vmbus_close_internal,
+           TP_PROTO(const struct vmbus_channel_close_channel *msg, int ret),
+           TP_ARGS(msg, ret),
+           TP_STRUCT__entry(
+                   __field(u32, child_relid)
+                   __field(int, ret)
+                   ),
+           TP_fast_assign(
+                   __entry->child_relid = msg->child_relid;
+                   __entry->ret = ret;
+                   ),
+           TP_printk("sending child_relid 0x%x, ret %d", __entry->child_relid,
+                   __entry->ret)
+       );
+
 #undef TRACE_INCLUDE_PATH
 #define TRACE_INCLUDE_PATH .
 #undef TRACE_INCLUDE_FILE